Airport express and Playstation 3 Problems

My PS3 60G recognizes my airport express network. However, the PS3 time outs while trying to receive the IP address. The airport network is set to assign IP addresses automatically, so what's the problem?

no the firmware update that came through the sony online service is called firmware 1.5 this firmware has created a whole bunch of problems for ps3 owners one being the console freezes and or crashes on blu ray disks